Water-motor.



H. BROWN. WATER MOTOR.

APPLIOATION FILED D3019, 1907.

905,838. Patented Dec. 8, 1908- WITNESSES INVENTOI? yJ m JT/m I lizzv/eyfirawm T 15 gym/ A TTORNE VS 1 1n: NORRIS PETERS 50., WASHINGTON, 1:. c4

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HARVEY BROWN, OF BRANDT, OHIO.

WATER-MOTOR.

Specification of Letters Patent.

Patented Dec. 8, 1908.

Application filed December 19, 1907. Serial No. 407,174.

To all whom it may concern:

Be it known that I, HARVEY BROWN, a citizen of the United States, and a resident of Brandt, in the county of Miami and State of Ohio, have invented a new and Improved Water-Motor, of which the following is a full, clear, and exact description.

This invention relates to certain improve ments in motors adapted to be operated by water or other fluid under pressure, and relates more particularly to that type of motor in which a cylinder and a piston are employed, the piston having two separate chambers intermediate its opposite sides, one of which communicates with the inlet port and the other of which communicates with the exhaust port, and both of which communicate with the chambers in the ends of the cylinder outside of the piston faces.

The object of my invention is to simplify the piston construction by making the cylinder form the wall of the chambers between the piston faces, to mount the inlet and exhaust ports in the cylinder wall and to provide mechanism intermediate the piston faces for operating the valves.

The motor is designed for driving comparatively easily operated machinery, as, for instance, washing machines, and the like, and is adapted to operate under the normal water pressure ordinarily occurring in city water mains.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures, and in which- Figure 1 is a longitudinal section through a water motor constructed in accordance with my invention; Fig. 2 is a vertical sec tion on the line 22 of Fig. 1 Fig. 3 is a vertical section on the line 33 of Fig. 1; and Fig. 4 is a top plan view showing certain modifications in the construction, parts being broken away and in section.

In my improved motor, I employ a cylinder 10 of the ordinary form of construction,

supported in any suitable manner, as, for instance, upon standards 11, and having the ends thereof closed by cylinder heads. 12, held in place in any suitable manner. Intermediate the ends of the cylinder there are rovided two ports 13 and 14, exactly simiar and one serving as an inlet port and the other as an exhaust or outlet port. These two ports are preferably arranged adjacent each other and midway between the two cylinder heads 12, 12. Within the cylinders are two piston heads 15 and 16, spaced a distance apart substantially equal to one-half the length of the cylinder, and held rigid in respect to each other by a longitudinallydisposed partition 17, the side edges of which engage with the cylinder walls. The partition 17 serves to divide the space between the pistons into two separate and distinct chambers 18 and 19, each communicating with one of the ports 13 and 14, and each of a constant volume.

The walls of each chamber are formed by the partition 17 the two piston heads 15 and 16, and a portion of the cylinder walls. Either of the istons may be rigidly secured to a piston rod or, as in the form illustrated, both pistons may be connected to piston rods 20 and 21, extending in op osite directions and through suitable pac rings in the cylinder heads. Each iston is provided with two passages theretiirough, one at each side of the partition, and each passage is controlled by a valve. The piston 15 is provided with passages 22 and 23, the former of which is controlled by a valve 24 opening inwardly into the chamber 18, and the latter of which is controlled by a valve 25 opening outwardly from the chamber 19. The piston 16 is provided with two passages 26 and 27, the former being controlled by a valve 28, o ening inwardly into the chamber 18, and t e other by a valve 29 o ening outwardly from the chamber 19. T e two valves 24 and 28, both of which open inwardly into the chamber 18, are carried by a valve rod 30, said rod being of such a length that both valves cannot be seated at the same time; while the valves 25 and 29 are carried by a valve rod 31, also so constructed that both of these valves cannot be seated at the same time.

Extending inwardly from the inlet and outlet ports 13 and 14, are two brackets 32 and 33, serving as guides for the two valve stems 30 and 31, and also serving as abutments for coil springs encircling said valve stems. Adjacent the bracket 32 are two coil springs 34, adapted to engage alternately with the valves 24 and 28, and encircling the valve rod 31 are two coil springs 35, adapted to engage alternately with stops 35 adjacent the ends of said valve rod.

In the operation of my improved motor, water or other suitable fluid under pressure is admitted through the inlet ort 13', and with the parts in the position s own in Fig. 1, it may pass the valve 28 at the right-hand end of the cylinder and force the piston toward the left-hand end. The water in the left-hand end may pass the valve 25 into the chamber 19 and escape through the port 14. When the piston reaches approximately its limiting position, one of the springs 34 engages with the surface of the valve 28, and upon the compression of this spring it overcomes the diiference in pressure upon the opposite sides of the valve 24 and opens this valve and closes the valve 28. At the same time, one of the springs 35 moves the valve rod 31 longitudinally to open the valve 29 and close the valve 25. The water entering the chamber 18 may then pass the valve 24 at the left-hand end of the cylinder, and the water in the right-hand end may escape to the chamber 19 and the exhaust port. The piston is then caused to move back and forth in the cylinder under the pressure of the water, and the valves automatically operate to reverse the flow of water at the end of each piston stroke.

In the slightly modified construction shown in Fig. 4, springs 34 and 35 are em loyed, but instead of abutting against brac ets 32 and 33, they are mounted on the outer ends of the valve rods, so as to abut against the cylinder heads 12. In this construction, I have also illustrated a rack bar 36, having its ends rigidly connected to the ends of the piston rods 20 and 21, and having its intermediate portion in engagement with a gear wheel 37, adapted to be rotated alternately in o posite directions upon the reciprocation of t e piston. The piston rods 20 and 21 are illustrated as being supported not only in the cylinder heads, but also in bearings 38, but it is evident that if the packing boxes in the cylinder heads be of sufficient length and strength, these supports may be omitted.

Having thus described my invention, I claim as new anddesire to secure by Letters Patent:

1. In a fluid motor, the combination of a cylinder having an inlet and an outlet port intermediate its ends, two pistons within said cylinder and spaced apart and held rigid in respect to each other by a partition subdividing the intervening space into two chambers, one of which communicates with the inlet port and the other of which communicates with the exhaust port, both of said pistons having passages therethrough, whereby each chamber may communicate with the cylinder at either end thereof, and valves controlling said passages.

2. In a fluid motor, the combination of a cylinder having an inlet and an outlet port intermediate its ends, two pistons within said cylinder and spaced apart and held rigid in respect to each other by a partition subdividing the intervening space into two chambers, the walls of each of which are formed by the cylinder, the pistons and the partition, said pistons having passages whereby each chamber may communicate with the cylinder at either end thereof, and valves controlling said passages.

3. In a fluid motor, the combination of a cylinder having an inlet and an exhaust port intermediate its ends, two pistons Within said cylinder and spaced apart and held rigid in respect to each other by a partition subdividing the intervening spaces into two chambers, one of which communicates with the exhaust port, said pistons having passages therethrough, whereby each chamber may commu nicate with the cylinder at either end thereof, valves for controlling said passages, brackets carried by said cylinder and extending inwardly into said chambers, and means carried by said brackets for operating said valves.

4. In a fluid motor, the combination of a cylinder having an inlet and an exhaust port intermediate its ends, two pistons within said cylinder and spaced apart and held rigid in respect to each other by a partition subdividing the intervening spaces into two chambers, one of which communicates with the exhaust port, said pistons having oassages therethrough, whereby each chamber may communicate with the cylinder at either end thereof, valves for controlling said passages, brackets carried by said cylinder and extending inwardly into said chambers, and springs carried by said brackets for operating said valves.

In testimony whereof I have signed my name to this specification in the presence of two subscribmg wltnesses.

HARVEY BROWN 

